NXP Semiconductors MC9S08AC32MPUER

Overview

MC9S08AC32MPUER from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller featuring a 40-MHz CPU, 32 KB on-chip FLASH, 2 KB RAM, and integrated peripherals including dual SCI, SPI, I²C, 16-channel 10-bit ADC, and three 16-bit TPM timer modules. It operates at up to 20 MHz bus frequency and supports LIN 2.0 via SCI, making it suitable for automotive body control modules and industrial sensor interfaces.

For engineers reviewing the MC9S08AC32MPUER datasheet, MC9S08AC32MPUER pinout, MC9S08AC32MPUER application, or MC9S08AC32MPUER equivalent, key selection criteria include its QFN-48 copper-wire package, background debug system with ICE support, COP watchdog with independent 1 kHz clock, low-voltage detection with interrupt/reset, and hardware CRC module for memory integrity verification.

Technical Context

The MC9S08AC32MPUER implements the S08CPUV2 core with HC08 instruction set extension (including BGND), supports up to 32 interrupt/reset sources, and integrates an Internal Clock Generator (ICG) with NVM-trimmed precision oscillator. Its memory subsystem includes FLASH with block protection, security options, and vector redirection capability.

Peripherals are tightly coupled to the bus architecture: dual SCI modules support master/slave extended break for LIN 2.0 compliance; I²C operates up to 100 kbps with 10-bit address extension; ADC provides automatic compare and temperature sensor input; TPM modules offer edge-aligned PWM, input capture, and buffered centered PWM modes across up to six channels.

Key Specifications

Pinout & Package

MC9S08AC32MPUER is housed in a 48-pin QFN package (98ASA00466D) with exposed thermal pad, migrated from gold to copper wire bonding per Freescale QFN Addendum Rev. 0 (July 2014). The package supports fine-pitch surface-mount assembly and requires controlled solder reflow per EB806 guidelines for exposed-pad electrical connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with MC9S08AC32MPUER, S9KEAZ32AMLH offers modern ARM architecture and expanded connectivity at the cost of legacy toolchain compatibility, while MC9S08AC48CPUE provides seamless FLASH scalability within the same HCS08 ecosystem and footprint.

Availability

MC9S08AC32MPUER is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance controllers, and portable medical devices requiring stable component supply across multi-year production cycles.

Supply support for MC9S08AC32MPUER includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, formed from the acquisition of Freescale Semiconductor in 2015.

The HCS08 family-including MC9S08AC32MPUER-was designed for cost-sensitive, real-time embedded control in automotive and industrial environments where deterministic response, robust debug, and long-term supply stability are critical.

FAQ

What is the maximum operating frequency of the MC9S08AC32MPUER CPU core?

The MC9S08AC32MPUER features an HCS08 CPU core rated for up to 40 MHz operation. Its internal bus frequency runs at up to 20 MHz, determined by the system clock divider and selected clock source. This timing is validated across the full voltage range (2.7–5.5 V) and specified in Appendix A of the MC9S08AC60 Series Data Sheet Rev. 3.

Does the MC9S08AC32MPUER support LIN 2.0 communication natively?

Yes, the MC9S08AC32MPUER supports LIN 2.0 natively through its dual Serial Communications Interface (SCI) modules. Each SCI includes hardware-assisted master extended break generation and slave extended break detection, fully compliant with SAE J2602 and ISO 17987-4. No external transceiver is required for basic LIN slave functionality.

What package type and pin count does the MC9S08AC32MPUER use?

The MC9S08AC32MPUER uses a 48-pin Quad Flat No-Lead (QFN) package with exposed thermal pad, documented under case outline number 98ASA00466D. This copper-wire-bonded variant replaced the earlier gold-wire version (98ARL10606D) per Freescale's QFN Addendum Rev. 0 (July 2014).

How much FLASH and RAM memory does the MC9S08AC32MPUER include?

The MC9S08AC32MPUER integrates 32 KB of on-chip FLASH memory with security options, block protection, and vector redirection, plus 2 KB of on-chip RAM. These values are fixed for this variant and confirmed in the "Memory Options" section of the MC9S08AC60 Series Data Sheet Rev. 3, which explicitly covers MC9S08AC32.

Is there hardware support for cyclic redundancy checking in the MC9S08AC32MPUER?

Yes, the MC9S08AC32MPUER includes a dedicated Cyclic Redundancy Check (CRC) module (S08CRCV1) implementing a 16-bit shift register. It supports ITU-T (CCITT) polynomial (x¹⁶ + x¹² + x⁵ + 1) and accelerates checksum computation for FLASH, RAM, or external memory without CPU intervention.